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浙江省杭嘉湖水网平原区地势比较低洼,地下水位较高(一般在田面下0.3～0.5米处),而土壤质地又较粘重(粘壤土～壤粘土),通透性较差.在冬种期间,即使排去田面积水但土层内部仍滞水较多,阻碍冬作物(麦类、油菜、紫云英等)根系的生长发育,有不同程度的“渍害”,这是影响冬作稳产高产的一个重要原因.在淹水种稻期间,同样由于土壤水下渗极慢(土壤渗漏量一般小于1毫米/24小时),影响土体内部水、气的互换更新,养分的矿化,障碍
Zhejiang Hangjiahu water plain area is low-lying, high groundwater level (usually 0.3 to 0.5 meters below the field), while the soil texture is more sticky (clay loam ~ loam), permeability is poor. During the winter planting period, even if the surface water is discharged but there is still more stagnant water within the soil layer, which hinders the growth and development of the winter crops (wheat, rape, astragalus, etc.), there are different degrees of “stains” Affecting the stable and high winter productivity is an important reason.During the flooding of rice, the same due to the slow penetration of soil water infiltration (soil leakage is generally less than 1 mm / 24 hours), affecting the internal soil water and gas exchange update , Nutrient mineralization, obstacles